[AusNOG] Telstra Network Down

[Chad Kelly]

I think now a days cloud refers to just about anything that's hosted 
online thanks to it being used by marketers.

On 2/2/2017 7:16 PM, Robert Hudson wrote:
> In most cases, cloud is just someone else's computer...
>
> On 2 Feb 2017 7:14 PM, "Chad Kelly" <chad at cpkws.com.au 
> <mailto:chad at cpkws.com.au>> wrote:
>
>     On 2/2/2017 6:50 PM, Mark Smith wrote:
>>
>>
>>     On 2 Feb. 2017 4:30 pm, "Chad Kelly" <chad at cpkws.com.au
>>     <mailto:chad at cpkws.com.au>> wrote:
>>
>>         On 2/2/2017 3:19 PM, ausnog-request at lists.ausnog.net
>>         <mailto:ausnog-request at lists.ausnog.net> wrote:
>>
>>             Of course when people say we have 2 core data centers,
>>             this should imply no
>>             data center is allowed to run over 50% capacity. It's
>>             odd/strange that 3
>>             active core data centers should sound so unorthodox, yet
>>             this is the only
>>             way to assure you can run your DCs at 65% and handle a DC
>>             going black. Begs
>>             the question why 4 active core DCs isn't standard
>>             architecture for core
>>             national infrastructure (which would assure high
>>             availability under 75%
>>             load), and 2x efficient in idle infrastructure.
>>
>>
>>         I like your idea in theory.
>>
>>
>>     It's not theory. At one of the ISP's I've worked for we scaled
>>     out BRASes this way. As you add units of capacity, the required
>>     redundancy capacity required to cover a single unit failure
>>     reduces across all the other units. It works when you can divide
>>     your problem up into smaller sub-problems and distribute them
>>     across a pool.
>>
>>     The argument sometimes used against it is that it is more devices
>>     to manage. True, however that is tractable by using config
>>     templates, automation and device management platforms ("software
>>     defined networks"). The problems of managing many devices is not
>>     a new one if you've spent any time managing fleets of desktop PCs.
>>
>>
>>
>>
>>
>>
>>
>>         But building data centres costs money and a significant
>>         amount of it.
>>
>>
>>
>>
>>     You get what you pay for. If you need high availability, you need
>>     to be prepared to pay the price if it. If you can't afford the
>>     price, then it is likely your availability requirements are
>>     greater than they really need to be. Put a dollar cost against
>>     the consequence of a failure, and you might find you really do
>>     need to pay the price of the HA you want.
>>
>>     If you can't afford to build DCs, you rent space in other
>>     people's to meet your availability goals.
>>
>>
>>
>>         I remember when the Warrnambool exchange fire occurred, a
>>         discussion was had around fire suppression and the lack of it
>>         in a critical exchange for regional Victoria.
>>
>>         Begs the question did they have appropriate levels of fire
>>         suppression equipment installed?
>>
>>         No good having multiple lots of equipment if its not being
>>         protected from fire properly.
>>
>>
>>
>>     A better architecture is one where a facility fire has a far
>>     smaller impact.
>>
>>     Your unit of expansion is your potential unit of failure. Larger
>>     units of expansion, larger consequences of failure.
>>
>>     Regards,
>>     Mark.
>>
>>
>>
>>
>>         <snip>
>>
>         I get where you are coming from.
>
>     A group of us were discussing the true meaning of cloud in terms
>     of web hosting the other day, I basically said that if the server
>     isn't setup with load balancing across multiple DC's that it isn't
>     really proper cloud hosting. It needs to be setup with high
>     availability.
>
>     A lot of providers use the term cloud when its not.
>
>
>     -- 
>     Chad Kelly
>     Manager
>     CPK Web Services
>     webwww.cpkws.com.au <http://www.cpkws.com.au>
>     phone 03 9013 4853
>
>
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>


-- 
Chad Kelly
Manager
CPK Web Services
web www.cpkws.com.au
phone 03 9013 4853

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